1201120121020 has 24 divisors (see below), whose sum is σ = 2548355889744. Its totient is φ = 475494974976.

The previous prime is 1201120121017. The next prime is 1201120121051. The reversal of 1201120121020 is 201210211021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309565102 + ... + 309568981.

It is an arithmetic number, because the mean of its divisors is an integer number (106181495406).

Almost surely, 2^{1201120121020} is an apocalyptic number.

1201120121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201120121020 is an abundant number, since it is smaller than the sum of its proper divisors (1347235768724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201120121020 is a wasteful number, since it uses less digits than its factorization.

1201120121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619134189 (or 619134187 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1201120121020 its reverse (201210211021), we get a palindrome (1402330332041).

Subtracting from 1201120121020 its reverse (201210211021), we obtain a palindrome (999909909999).

The spelling of 1201120121020 in words is "one trillion, two hundred one billion, one hundred twenty million, one hundred twenty-one thousand, twenty".